Beijing Institute of Mathematical Sciences and Applications Beijing Institute of Mathematical Sciences and Applications

  • About
    • President
    • Governance
    • Partner Institutions
    • Visit
  • People
    • Management
    • Faculty
    • Postdocs
    • Visiting Scholars
    • Staff
  • Research
    • Research Groups
    • Courses
    • Seminars
  • Join Us
    • Faculty
    • Postdocs
    • Students
  • Events
    • Conferences
    • Workshops
    • Forum
  • Life @ BIMSA
    • Accommodation
    • Transportation
    • Facilities
    • Tour
  • News
    • News
    • Announcement
    • Downloads
About
President
Governance
Partner Institutions
Visit
People
Management
Faculty
Postdocs
Visiting Scholars
Staff
Research
Research Groups
Courses
Seminars
Join Us
Faculty
Postdocs
Students
Events
Conferences
Workshops
Forum
Life @ BIMSA
Accommodation
Transportation
Facilities
Tour
News
News
Announcement
Downloads
Qiuzhen College, Tsinghua University
Yau Mathematical Sciences Center, Tsinghua University (YMSC)
Tsinghua Sanya International  Mathematics Forum (TSIMF)
Shanghai Institute for Mathematics and  Interdisciplinary Sciences (SIMIS)
BIMSA > Category and Topological Order Seminar Noninvertible surfaces, topological orders, and the 2-Deligne theorem
Noninvertible surfaces, topological orders, and the 2-Deligne theorem
Organizer
Hao Zheng
Speaker
Matthew Yu
Time
Tuesday, May 23, 2023 9:00 AM - 11:00 AM
Venue
Online
Abstract
Fusion higher categories have recently been of interest for their ability to describe the topological content of quantum field theories. I will focus on the notion of what is an anomaly for a noninvertible symmetry enacted by surface operators of a 2-category. I will then give examples of when we have reasonable control over these anomalies. In describing this I will introduce techniques that are also applicable for classifying 5d topological orders, and I will present the full classification. Finally I will present a result about fiber 2-functors which categorifies a theorem of Deligne's for symmetric 1-categories.
Beijing Institute of Mathematical Sciences and Applications
CONTACT

No. 544, Hefangkou Village Huaibei Town, Huairou District Beijing 101408

北京市怀柔区 河防口村544号
北京雁栖湖应用数学研究院 101408

Tel. 010-60661855
Email. administration@bimsa.cn

Copyright © Beijing Institute of Mathematical Sciences and Applications

京ICP备2022029550号-1

京公网安备11011602001060 京公网安备11011602001060